CN208071737U - Continuous charging arc furnace system - Google Patents
Continuous charging arc furnace system Download PDFInfo
- Publication number
- CN208071737U CN208071737U CN201820431947.1U CN201820431947U CN208071737U CN 208071737 U CN208071737 U CN 208071737U CN 201820431947 U CN201820431947 U CN 201820431947U CN 208071737 U CN208071737 U CN 208071737U
- Authority
- CN
- China
- Prior art keywords
- conveyer belt
- continuous charging
- section conveyer
- preheating section
- arc furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010891 electric arc Methods 0.000 claims abstract description 56
- 238000000605 extraction Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 42
- 239000010959 steel Substances 0.000 abstract description 42
- 239000000428 dust Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000003723 Smelting Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 30
- 239000003546 flue gas Substances 0.000 description 21
- 239000002893 slag Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 229910002091 carbon monoxide Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 241001417490 Sillaginidae Species 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003923 scrap metal Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides continuous charging arc furnace system, including electric arc furnaces, conveyor unit, driving unit, closed cell and air-flow adjust unit.Continuous charging arc furnace system described in the utility model, its smelting molten steel has high production capacity, relatively low and adjustable smelting cycle, minimum energy consumption cost, CO conversion is high, utilization rate is high, heat exchange effect is good, production capacity is good, sound level is low, dust emission is few, the advantages that being conducive to environmental protection, meet national requirements for environmental protection.
Description
Technical field
The utility model belongs to arc furnace equipment technical field, and in particular to continuous charging arc furnace system.
Background technology
It will appear carbon monoxide in flue gas, and flue gas heat is especially high, but CO conversion is low, utilization rate
Low, heat exchange effect is poor, and production capacity is low, and sound level is high, dust emission is more, is unfavorable for environmental protection, does not meet national requirements for environmental protection.
Utility model content
The technical problem to be solved by the present invention is to provide continuous charging arc furnace systems, overcome drawbacks described above.
In order to solve the above technical problems, the utility model provides continuous charging arc furnace system, including electric arc furnaces, conveyer belt
Unit, driving unit, closed cell and air-flow adjust unit,
The conveyor unit includes feeding section conveyer belt, preheating section conveyer belt and connection trolley, the feeding section transmission
Band and preheating section conveyer belt are suspended on multiple sunpenders, and the multiple sunpender is hung on the pedestal of supporting mechanism, the feeding section
The tail end of conveyer belt connects the head end of the preheating section conveyer belt, and the tail end of the preheating section conveyer belt connects the connection trolley
Head end, the tail end of the connection trolley connects the electric arc furnaces,
The driving unit includes end driving device and intermediate drive device, and the end driving device is installed on described
The head end of feeding section conveyer belt, the end driving device drive the feeding section conveyer belt vibrations, the intermediate drive device
It is installed on the junction of the tail end of the feeding section conveyer belt and the head end of the preheating section conveyer belt, the intermediate drive device
The preheating section conveyer belt is driven to shake,
The closed cell includes petticoat pipe and watercooled hood, and the petticoat pipe covers on the preheating section conveyer belt, described
Watercooled hood covers on the connection trolley,
The air-flow adjusts unit and includes dust-extraction unit, dynamic sealing means and mix cold wind regulating system, and the dedusting fills
It installs and is placed on the petticoat pipe, close to the head end of the preheating section conveyer belt, the dynamic sealing means set the dust-extraction unit
It sets above the head end of the preheating section conveyer belt, the cold wind regulating system of mixing is set on the watercooled hood.
As a kind of preferred embodiment of continuous charging arc furnace system described in the utility model, the feeding section conveyer belt and
The section of preheating section conveyer belt is trapezoidal, and the top of the feeding section conveyer belt and the top of preheating section conveyer belt are equipped with skirt
Side structure.
As a kind of preferred embodiment of continuous charging arc furnace system described in the utility model, the intermediate drive device and
End driving device is vibrator.
As a kind of preferred embodiment of continuous charging arc furnace system described in the utility model, the watercooled hood with it is described
The junction of the import of electric arc furnaces is equipped with baffle plate, and the baffle plate is fixed in the watercooled hood.
As a kind of preferred embodiment of continuous charging arc furnace system described in the utility model, the continuous charging electric arc furnaces
System further includes pressure apparatus, and the pressure apparatus is connect with the electric arc furnaces.
As a kind of preferred embodiment of continuous charging arc furnace system described in the utility model, the pressure apparatus is from upper past
Under be divided into three layers, respectively transformer room, hyperbaric chamber and hydraulic pressure chamber.
Compared with prior art, the utility model proposes continuous charging arc furnace system with using traditional technology or other
The electric furnace of steel-smelting technology is compared, and smelting molten steel has high production capacity, relatively low and adjustable smelting cycle, minimum energy consumption
Cost, CO conversion are high, utilization rate is high, and heat exchange effect is good, and production capacity is good, and sound level is low, dust emission is few, is conducive to
Environmental protection, the advantages that meeting national requirements for environmental protection.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.Wherein,
Fig. 1 is the structural schematic diagram of the continuous charging arc furnace system of the utility model.
Wherein：1 it is electric arc furnaces, 2 be feeding section conveyer belt, 3 be preheating section conveyer belt, 4 be connection trolley, 5 is sunpender, 6
It is intermediate drive device for pedestal, 7,8 be end driving device, 9 be petticoat pipe, 10 be watercooled hood, 11 be dust-extraction unit, 12 is
Dynamic sealing means, 13 for mix cold wind regulating system, 14 be skirt border structure, 15 be baffle plate, 16 be pressure apparatus, 161 be change
Depressor room, 162 be hyperbaric chamber, 163 be hydraulic pressure chamber.
Specific implementation mode
Continuous charging arc furnace system described in the utility model comprising：Electric arc furnaces 1, conveyor unit (not shown),
Driving unit (not shown), closed cell (not shown) and air-flow adjust unit (not shown).
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to specific implementation
Mode is described in further detail the utility model.
First, " one embodiment " or " embodiment " referred to herein refers to that may be included at least one reality of the utility model
A particular feature, structure, or characteristic in existing mode." in one embodiment " that different places occur in the present specification is not
The same embodiment is referred both to, nor the individual or selective embodiment mutually exclusive with other embodiment.
Secondly, the utility model is described in detail using structural schematic diagram etc., when the utility model embodiment is described in detail,
For purposes of illustration only, indicating that the schematic diagram of continuous charging arc furnace system structure can disobey general proportion and make partial enlargement, Er Qiesuo
It is example to state schematic diagram, should not limit the range of the utility model protection herein.In addition, should include length in actual fabrication
The three dimensions of degree, width and depth.
Continuous charging electric arc furnace smelting technique is that a kind of electric arc furnaces can be with continuously pre-heating steel scrap, the pig iron and charging and right simultaneously
The technique that these metal charges are melted and refined.
The principle of continuous charging electric arc furnace smelting technique is effective use electric furnace flue gas as heat source, will be fed to electric arc furnaces
Interior steel scrap is preheated.During continuous steel scrap charging, which fires carbon monoxide in the sensible heat and flue gas of electric furnace flue gas
It burns the chemical heat generated and optimizes use.
The combustible that metal charge carries can also burn in preheated zone, equally also be that metal charge preheats and maintain flue gas
The required purification temperature of falling dust room after preheating section provides heat.
Pre-heating technique is completed in preheating section.When electric furnace flue gas enters preheating section conveyer belt 3 from electric furnace, pass through control
The incorporation of surrounding air processed controls the heat that the carbon monoxide second-time burning inside preheating section generates.By to surrounding air and
The research of flue gas mixing has carried out correct design to improve and enhance the efficiency of second-time burning to the shape of preheating section petticoat pipe 9.
The incorporation of surrounding air is controlled by secondary combustion air turnover panel aperture, which is located at preheating section first segment and leans on
At nearly electric furnace.Turnover panel opening degree is automatic, and is controlled according to flue-gas temperature and oxygen content by second-time burning control unit
System.
Oxidation of Carbon Monoxide reaction generates highly exothermic amount, which increase the temperature of flue gas and provides from electric furnace to preheating section
Most of heat.Flue gas stream is transmitted in preheating section channel by aqueous cold plate along steel scrap charging counter motion, steel scrap.Heat passes through
Convection current and radiation mode are transmitted to steel scrap on the move, and steel scrap temperature can be heated to about 500 DEG C.Because being generated in preheating section
Additional heat, the temperature that flue gas leaves preheating section is about 800~900 DEG C.
The carbon source of bath lancing is partly to come to be added to the molten bath steel scrap metal charge-pig iron, molten iron, cast iron, iron filings or coke
Coal dust.In continuous charging electric arc furnace technology, in addition to the carbon taken away by molten steel, other carbon will be all for making foamed slag or work
For preheating section fuel.
Wall lance is blown into the oxygen in stove, and key player is play in continuous charging electric arc furnace technology：
Oxygen blast produces a certain proportion of carbon monoxide, this is the main fuel of scrap steel preheating section, in order to generate desired ratio
The carbon monoxide of example needs enough carbon in molten bath, and electric furnace must be sealed correctly, so as not to carbon monoxide in stove two
Secondary burning.
Foamed slag is most important, it is necessary to ensure that most heats that electric arc generates are transferred to molten bath.It blows in entire molten bath
The carbon monoxide of oxygen generation and the foamed slag for maintaining balance, foamed slag are also most important for protecting the radiation of electric arc to resistance to material.
In addition, the correct ingredient of foamed slag can greatly limit the corrosion for the lining of resistance to material.
The collision effect of oxygen jet penetrates entire molten bath and pushes molten bath circulatory motion, and therefore improve bath temperature and
Chemical composition uniformity.In addition, the new design of exhanst gas outlet is to optimize the flue gas stream inside preheating section, be increased to steel scrap
Heat exchange efficiency.A flue gas analyzer is also equipped with to execute the entire matter and energy EQUILIBRIUM CALCULATION FOR PROCESS for increasing electric furnace.Pass through cigarette
Gas ingredient, other measured values such as electric furnace Metal Weight, can calculate the heat for being transferred to steel scrap in heated belt, then calculate
Obtain steel scrap electric furnace entrance temperature.Therefore, the temperature of steel scrap can be optimised, and enters electricity with temperature as high as possible
Stove, to which power consumption is reduced to extremely low level.
The transport system of continuous charging electric arc furnaces is usually composed in series by several conveyer belts：
The connection trolley 4 of preheating section conveyer belt 3, one of one or more feeding section conveyer belts 2, one, all these transmission
Band is with quick vibration mode conveying steel scrap backward, such movement allow steel scrap and conveyer belt together to Forward forward at a slow speed
It is dynamic, and slipped over from transmission belt surface when conveyer belt shakes backward.Its result is exactly that steel scrap is moved to electric furnace direction.Realize shake
Dynamic, each conveyer belt is suspended from serial sunpender 5, and sunpender 5 is suspended on the pedestal 6 of supporting mechanism.
The action of continuous charging electric arc furnaces conveyer belt is generated by driving unit, and there are two types of different types for driving unit：End
Hold driving device 8 and intermediate drive device 7.End driving device 8 may be mounted at the starting of first segment feeding section conveyer belt 2
End, and 7 typical installation locations of intermediate drive device are the link positions of feeding section conveyer belt 2 and preheating section conveyer belt 3.All biographies
It is trapezoid cross section to send band all, is made of special, wear-resistant carbon steel sheet.Preheating section conveyer belt 3 and connection trolley 4 are water coolings.Feeding section
2 top of conveyer belt is protected by skirt border structure 14, and conveyer belt is slid into so that steel scrap is added in overhead traveling crane.This conveyer belt lower part is added by roof beam structure
Strong rigidity.
Preheating section conveyer belt 3 is covered by the petticoat pipe 9 for the lining of resistance to material, and electric furnace flue gas is evacuated by dust-extraction unit 11, in petticoat pipe 9
To electric furnace opposite direction flowing, to preheated metallic material.This conveyer belt lower part rigidity is reinforced by roof beam structure.Connection trolley 4 is water cooled cigarette
10 covering of cover, because this region is more nearly electric arc furnaces 1, flue-gas temperature higher.
10 top of watercooled hood, which is equipped with, mixes cold wind regulating system 13, is contained by the temperature and oxygen of continuous charging electric arc furnaces 1
Measurement carries out control operation：Its target is the carbon monoxide in completely burned flue gas and is converted to heat steel scrap.
Between feeding section conveyer belt 2 and preheating section conveyer belt 3, usually there are the dynamic sealing means 12 with wind turbine, to keep away
Exempt to suck surrounding air from conveyer belt opening.
Another distinguishing feature of continuous charging electric arc furnaces is to be located at outlet watercooled hood 10 and electricity along heated belt
Baffle plate 15 between 1 entrance of arc stove, such as Fig. 1.These baffle plates 15 enhance useless by electric furnace flue gas directly " nature " heating
The effect of steel.In fact also really in this way, baffle plate 15 is by increasing to the convection current of steel scrap, to enhance heat exchange.
Such as：The average steel scrap temperature of one 18 meters of conveyer belt/section, two different curves illustrate baffle plate how to allow into
Enter the steel scrap temperature higher of electric furnace.It should be pointed out that the mean temperature of steel scrap is shown in this, in fact, upper layer scrap ratio
Lower layer's steel scrap temperature higher, because it is closer to heat smoke.
The smelting process of this continuous charging is all more efficient under any circumstance from an economic point of view.
Those of ordinary skill in fields it should be appreciated that, the characteristics of the utility model or the first purpose exists
In：The utility model proposes continuous charging arc furnace system has the following advantages：
1, raw material.It can be said that the most important advantage of continuous charging electric arc furnaces is that do not have to raw metal in economic benefit
It is special to require.In view of this, user can buy low-density steel scrap (not having volumetric constraint) and less steel scrap (preferably
Recovery rate of iron), thus significantly decrease the cost of raw material.
Continuous charging operation allows very high flexibility, and DRI, HBI, liquid or the solid pig iron can be added.
In general, steel scrap and HBI can directly be fed by continuous charging electric arc furnaces, DRI can from furnace roof continuous charging,
Molten iron can pass through iron making water installations continuous charging.
In the case where raw material molten iron proportion is very high, continuous charging electric arc furnaces can be such that the processing performance of electric furnace obtains into one
The raising of step.
2, production capacity.The production capacity higher that transformer capacity per MW is brought, comes from lower energy consumption, higher electrified rate
(energization/smelting cycle) and " more flat " power supply curve.Moreover, because flat molten bath operation, safeguards that furnace outage time is minimum
's.In general, " tradition " eaf renovation increases about 20% to 30% at the production capacity of continuous charging electric arc furnaces, and is not necessarily to
Electric power and cleaner is transformed.
3, it consumes and energy saving.Compared with the electric arc furnaces of traditional operation mode, the reason of continuous charging saving energy of electric arc furnace, has useless
The preheating of steel, the refining pattern of continuous charging, electric arc is very stable always and is always covered by foamed slag, and electric arc arrives molten bath
Heat transference efficiency is high, and the heat loss to the resistance to material of furnace wall and bell, cooled plate also reduces.
Further, since bell is not opened usually, the time of material basket charging has not only been saved, and has saved heat to ring
The power loss of border air radiation.
The comparison of two kinds of power transmissions：The DIRECT ENERGY transmission of electrode to steel scrap carries out melting (top charging electric arc furnaces) and melts
Melting (continuous charging electric arc furnaces electric arc furnaces) is immersed in pond.
4, arc furnace transformer power
In continuous charging electric arc furnaces melting continuously technique, the use of transformer efficiency can be used more efficient：Without because
Active power caused by scrap melting is lost, the loss of time caused by not feeding.Therefore, same hour production capacity, needs
The power that transformer efficiency pushes up charging electric arc furnaces than tradition is lower.This means that transformer cost of investment reduces, and usual energy
Save the cost of investment of SVC.
5, energy kWh is consumed
Since continuous charging electric arc furnaces needs lower installed power and power consumption that can significantly reduce, with same production
The traditional type electric arc furnaces of energy is compared, and when signing electricity price contract with Utilities Electric Co., unit price of power can also reduce.
6, consumption of electrode
The reduction for the consumption of electrode that continuous charging electric arc furnaces is brought be due to:
Lower electrode current reduces consumption；
More ensure no lead rupture (since flat molten bath operates)；
Due to furnace reduction atmosphere, avoid thermode be exposed to surrounding air (with conventional batch feed open bell phase
Than) reduce consumption；
Higher production capacity.
7, steel scrap-molten steel recovery rate
The production of continuous charging electric arc furnaces can improve steel scrap to the recovery rate 1.0% to 2.0% of molten steel, this is because in slag
FeO concentration reduce.In the production of continuous charging electric arc furnaces, molten bath is continuously in refining pattern, and the concentration of carbon is suitable.Molten steel and
The concentration that the direct successive reaction of slag maintains FeO in slag is in reduced levels, balanced to reach equivalent with the concentration of carbon in molten bath.
In traditional electric furnace or shaft furnace operation, it is only the 10-15 minutes that heat smelts latter stage that molten bath, which is in refining pattern,
This time is not enough to that the FeO in slag is allowed to be reduced to level identical with continuous charging furnace operation.
Total dust reduction is due to flat molten bath operation mode (not expecting that basket is smelted and oxygen rifle cuts steel scrap), also due in advance
Flue gas flow rate is low in hot arc, and a large amount of dust deposits in steel scrap, and melts down and be melted.
8, nitrogen is mingled with
Continuous charging arc furnace system can reduce the nitrogen content in molten steel, this is because foamed slag prevents air electric
Arc ionizes.
9, power network fluctuation (flickering) is minimized
Different from other conventional batch charging electric arc furnaces, the constant flat molten bath operation of continuous charging electric arc furnaces electric arc furnaces is kept away
Electric pole short circuit is exempted from and has made arc stability.Therefore, for power grid, without reactive power peak value and flickering impact it is extremely low, i.e.,
Make to be not need expensive static var compensator (dynamic to mend SVC) generally also under weaker grid conditions.
Four, continuous charging electric arc furnaces environment-friendly advantage
The flue gas of material basket charging and dust loss are eliminated.Due to during conveyer belt feeds, bell close always and
And negative pressure in stove in entire technique, make working environment cleaner.
Dust yield is preferably minimized by the flat molten bath smelting process under foamed slag covering, meanwhile, some dust generated
It deposits in preheating section, is sent back in stove together with steel scrap.For example, in Gerdau Charlotte (U.S.) factory, use
Continuous charging arc furnace system, dust yield are down to 11kg/t from the 16kg/t of traditional batch charge, and the range of decrease is about 30%.
Compared with batch charge electric furnace, since electric arc is covered always situated in flat molten bath and by foamed slag, sound level is notable
It reduces.
1, dust emission
The most significant influence of continuous charging EAF Technology is that of obtaining more clean working environment, because of bell
It is closed always during continuous charging, and is negative pressure in stove in entire technical process.
Flue dust and dust during material basket charging are eliminated, and the molten bath under foamed slag covering smelts and minimizes powder
The generation of dirt, and the dust that a part generates deposits in preheating section, is added into stove together with steel scrap.It is existing to set
Standby middle addition continuous charging arc furnace system can reduce about 30% dust compared with conventional batch charging technology.
Since bell is seldom opened for feeding, required dust-removal cloth-bag with tradition or batch charge technique compared with quantity compared with
It is few.Therefore dedusting fan power can be lower.
2, sound level
Compared with any batch charge electric arc furnaces, sound level is extremely low because electric arc be always on flat molten bath by foam
Slag is covered.There is no need to kennels to carry out noise control.The reason of lower noise it is similar with flickering and harmonic wave reduction (flat molten bath and
Foamed slag).
3, dye object discharge
Due to the inherent characteristics of continuous charging electric arc furnace technology, second-time burning in preheating section, flue gas leaves continuous charging electricity
The condition of high temperature (800 DEG C -900 DEG C), the necessary condition that this Shi bioxin decomposes completely are always at when arc stove preheating section.
Flat molten bath operation allows continuous charging electric arc furnaces electric arc furnaces to be in this in most of tap to tap time
Under conditions of sample, this is a notable advantage compared with other electric arc furnaces with preheating or the top dress electric arc furnaces of standard.
It should be noted that above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although reference
The utility model is described in detail in preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this reality
It is modified or replaced equivalently with novel technical solution, without departing from the spirit and scope of technical solutions of the utility model,
It should all cover in the right of the utility model.
Claims (6)
1. continuous charging arc furnace system, including electric arc furnaces, conveyor unit, driving unit, closed cell and air-flow adjust list
Member, it is characterized in that：
The conveyor unit include feeding section conveyer belt, preheating section conveyer belt and connection trolley, the feeding section conveyer belt and
Preheating section conveyer belt is suspended on multiple sunpenders, and the multiple sunpender is hung on the pedestal of supporting mechanism, the feeding section transmission
The tail end of band connects the head end of the preheating section conveyer belt, and the tail end of the preheating section conveyer belt connects the head of the connection trolley
The tail end at end, the connection trolley connects the electric arc furnaces,
The driving unit includes end driving device and intermediate drive device, and the end driving device is installed on the charging
The head end of section conveyer belt, the end driving device drive the feeding section conveyer belt vibrations, the intermediate drive device installation
In the junction of the head end of the tail end and preheating section conveyer belt of the feeding section conveyer belt, the intermediate drive device drives
The preheating section conveyer belt vibrations,
The closed cell includes petticoat pipe and watercooled hood, and the petticoat pipe covers on the preheating section conveyer belt, the water cooling
Petticoat pipe covers on the connection trolley,
The air-flow adjusts unit and includes dust-extraction unit, dynamic sealing means and mix cold wind regulating system, and the dust-extraction unit is set
It is placed on the petticoat pipe, close to the head end of the preheating section conveyer belt, the dynamic sealing means are arranged to exist the dust-extraction unit
Above the head end of the preheating section conveyer belt, the cold wind regulating system of mixing is set on the watercooled hood.
2. continuous charging arc furnace system as described in claim 1, it is characterized in that：The feeding section conveyer belt and preheating section pass
It is trapezoidal to send the section of band, and the top of the feeding section conveyer belt and the top of preheating section conveyer belt are equipped with skirt border structure.
3. continuous charging arc furnace system as described in claim 1, it is characterized in that：The intermediate drive device and end driving
Device is vibrator.
4. continuous charging arc furnace system as described in claim 1, it is characterized in that：The watercooled hood and the electric arc furnaces
The junction of import is equipped with baffle plate, and the baffle plate is fixed in the watercooled hood.
5. continuous charging arc furnace system as described in claim 1, it is characterized in that：The continuous charging arc furnace system also wraps
Pressure apparatus is included, the pressure apparatus is connect with the electric arc furnaces.
6. continuous charging arc furnace system as claimed in claim 5, it is characterized in that：The pressure apparatus divides successively from top to bottom
It is three layers, respectively transformer room, hyperbaric chamber and hydraulic pressure chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820431947.1U CN208071737U (en) | 2018-03-29 | 2018-03-29 | Continuous charging arc furnace system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820431947.1U CN208071737U (en) | 2018-03-29 | 2018-03-29 | Continuous charging arc furnace system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208071737U true CN208071737U (en) | 2018-11-09 |
Family
ID=64042335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820431947.1U Expired - Fee Related CN208071737U (en) | 2018-03-29 | 2018-03-29 | Continuous charging arc furnace system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208071737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512623A (en) * | 2021-08-26 | 2021-10-19 | 中冶京诚工程技术有限公司 | Magnetic scrap steel preheating type electric arc furnace |
-
2018
- 2018-03-29 CN CN201820431947.1U patent/CN208071737U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512623A (en) * | 2021-08-26 | 2021-10-19 | 中冶京诚工程技术有限公司 | Magnetic scrap steel preheating type electric arc furnace |
| CN113512623B (en) * | 2021-08-26 | 2024-04-16 | 中冶京诚工程技术有限公司 | Magnetic scrap preheating type electric arc furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105698529B (en) | Modified side-blowing bath smelting furnace | |
| CN102433450B (en) | Oxygen-enriched side-blown reduction molten pool smelting furnace and method for smelting tin by using tin-enriched complex material in smelting furnace | |
| CN102851518B (en) | Fubang oxygen-enriched side-blown bath copper smelting furnace and operation method thereof | |
| US9453682B2 (en) | Steel production facility | |
| CN108359760A (en) | Large blast furnace maintains the operating procedure of direct motion using low-heat state strength coke | |
| CN108642237A (en) | A kind of steelmaking equipment | |
| CN106566907B (en) | The production method and melting reduction device of the direct smelt iron of iron ore | |
| CN108866270A (en) | A kind of steelmaking equipment | |
| CN110388830A (en) | Scrap preheater, arc-melting equipment and pre-heating mean | |
| CN105483393A (en) | Method for treating secondary lead through improved side-blowing smelting reduction furnace | |
| CN105441694A (en) | Method for treating copper concentrate through improved side blowing molten pool melting furnace | |
| CN204085215U (en) | A kind of electrical arc furnace flue gas waste heat utilization device | |
| CN106011341A (en) | Method for improving coal ratio in schreyerite blast furnace smelting | |
| CN107904347B (en) | Coal-based direct reduction shaft furnace and reduction method thereof | |
| CN209227012U (en) | A kind of steel-smelting device of continuously pre-heating steel scrap | |
| CN208472142U (en) | A kind of steelmaking equipment | |
| CN108411064A (en) | The method of waste steel for electric furnace preheating | |
| CN208071737U (en) | Continuous charging arc furnace system | |
| CN106996695A (en) | A kind of metallurgical furnace | |
| CN103333979B (en) | Electricity coal method molten point reduction iron production system and technical process thereof | |
| CN102409126B (en) | Integrated reduction ironmaking furnace and integrated reduction ironmaking process | |
| CN204752780U (en) | Melting reduction iron -smelting device | |
| CN205090798U (en) | Improved generation side -blown molten bath smelting furnace | |
| CN209685844U (en) | Add the device of fine iron breeze direct steelmaking using electric furnace high-temperature flue gas | |
| CN203810892U (en) | Coal-oxygen blowing melting separation shaft furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181109 |